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冷彎薄壁型鋼組合樓蓋面外和面內剛度試驗研究及理論分析

管宇 周緒紅 石宇 姚欣梅

管宇, 周緒紅, 石宇, 姚欣梅. 冷彎薄壁型鋼組合樓蓋面外和面內剛度試驗研究及理論分析[J]. 工程力學, 2023, 40(10): 21-32. doi: 10.6052/j.issn.1000-4750.2022.01.0079
引用本文: 管宇, 周緒紅, 石宇, 姚欣梅. 冷彎薄壁型鋼組合樓蓋面外和面內剛度試驗研究及理論分析[J]. 工程力學, 2023, 40(10): 21-32. doi: 10.6052/j.issn.1000-4750.2022.01.0079
GUAN Yu, ZHOU Xu-hong, SHI Yu, YAO Xin-mei. EXPERIMENTAL STUDY AND THEORETICAL ANALYSIS OF OUT-OF-PLANE AND IN-PLANE STIFFNESS OF COLD-FORMED THIN-WALLED STEEL COMPOSITE FLOOR[J]. Engineering Mechanics, 2023, 40(10): 21-32. doi: 10.6052/j.issn.1000-4750.2022.01.0079
Citation: GUAN Yu, ZHOU Xu-hong, SHI Yu, YAO Xin-mei. EXPERIMENTAL STUDY AND THEORETICAL ANALYSIS OF OUT-OF-PLANE AND IN-PLANE STIFFNESS OF COLD-FORMED THIN-WALLED STEEL COMPOSITE FLOOR[J]. Engineering Mechanics, 2023, 40(10): 21-32. doi: 10.6052/j.issn.1000-4750.2022.01.0079

冷彎薄壁型鋼組合樓蓋面外和面內剛度試驗研究及理論分析

doi: 10.6052/j.issn.1000-4750.2022.01.0079
基金項目: 國家自然科學基金項目(51908047);陜西省自然科學基礎研究計劃項目(2022JM-227,2022JQ-570);長安大學中央高?;究蒲袠I務費專項資金項目(300102281205)
詳細信息
    作者簡介:

    管 宇(1988?),男,天津人,副教授,博士,碩導,主要從事輕型鋼結構和鋼-混凝土組合結構研究(E-mail: guanyu88927@163.com)

    周緒紅(1956?),男,湖南南縣人,教授,博士,博導,中國工程院院士,主要從事鋼結構和鋼-混凝土組合結構基本理論及應用研究 (E-mail: zhouxuhong@126.com)

    姚欣梅(1992?),女,河北滄州人,講師,博士,主要從事輕型鋼結構理論與應用研究(E-mail: yaoxinmei1216@163.com)

    通訊作者:

    石 宇(1978?),女(苗族),湖北宣恩人,教授,博士,博導,主要從事輕型鋼結構理論與應用研究(E-mail: shiyu7811@163.com)

  • 中圖分類號: TU391;TU317+.1

EXPERIMENTAL STUDY AND THEORETICAL ANALYSIS OF OUT-OF-PLANE AND IN-PLANE STIFFNESS OF COLD-FORMED THIN-WALLED STEEL COMPOSITE FLOOR

  • 摘要: 冷彎薄壁型鋼組合樓蓋作為冷彎薄壁型鋼結構住宅體系中主要豎向承重和水平傳力構件,應具備良好的面外和面內受力性能以推動輕鋼結構體系由低層向多高層發展?;诖?,對冷彎薄壁型鋼組合樓蓋分別進行正常使用階段抗彎剛度試驗、抗彎承載力試驗以及面內剛度試驗,試驗結果表明:組合樓蓋面外最終破壞模式為C形樓蓋梁在最外側加載點處壓屈破壞,面內最終破壞模式為兩側C形樓蓋梁與壓型鋼板間自攻螺釘連接破壞,冷彎薄壁型鋼組合樓蓋屬于部分抗剪連接的組合樓蓋。設置樓面板會大幅提高組合樓蓋的面內承載力、面內剛度及面內延性,混凝土組合樓蓋的抗彎剛度和剛度退化程度優于石膏基自流平砂漿組合樓蓋?;诮M合樓蓋的受力機理和破壞特征,引入C形樓蓋梁與組合樓板界面滑移模量,推導了部分抗剪連接T形截面組合梁的等效抗彎剛度公式來計算樓蓋的豎向撓度;建立寬翼緣深梁受力分析模型,推導出組合樓蓋面內跨中位移計算方法。該文研究成果為完善冷彎薄壁型鋼多層住宅體系中組合樓蓋的設計計算理論提供了科學依據。
  • 圖  1  冷彎薄壁型鋼組合樓蓋

    Figure  1.  Cold-formed thin-walled steel composite floor

    圖  2  試驗試件構造 /mm

    Figure  2.  Structure of test specimen

    圖  3  試驗加載裝置

    Figure  3.  Test loading device

    圖  4  BM-A4試件破壞現象

    Figure  4.  Failure phenomenon of BM-A4 specimen

    圖  5  BM-B4試件破壞現象

    Figure  5.  Failure phenomenon of BM-B4 specimen

    圖  6  組合樓蓋豎向荷載-跨中撓度曲線

    Figure  6.  Vertical load- midspan deflection curve of composite floors

    圖  7  組合樓蓋簡化分析模型

    Figure  7.  Simplified analysis model of composite floor

    圖  8  組合樓蓋試件構造及加載裝置

    Figure  8.  Structure and loading device of composite floor specimen

    圖  9  組合樓蓋試件FL-1面內破壞特征

    Figure  9.  In-plane failure characteristics of composite floor specimen FL-1

    圖  10  組合樓蓋試件滯回曲線和骨架曲線

    Figure  10.  Hysteretic curve and skeleton curve of composite floor specimens

    圖  11  組合樓蓋試件剛度退化曲線

    Figure  11.  Stiffness degradation curve of composite floor specimens

    圖  12  組合樓蓋受力模型

    Figure  12.  Mechanical model of composite floor

    圖  13  組合樓蓋面內變形

    Figure  13.  In-plane deformation of composite floor

    圖  14  自攻螺釘滑移修正系數擬合曲線

    Figure  14.  Fitting curves of slip correction coefficient of self-tapping screw

    圖  15  邊跨U形樓蓋梁拼接構造

    Figure  15.  Splicing structure of outside U-shaped floor joists

    表  1  組合樓蓋試件構造參數及抗彎性能指標

    Table  1.   Structural parameters and bending performance indexes of composite floor specimens

    試件輕鋼骨架樓板自攻螺釘極限承載力/kN極限跨中撓度/mm延性
    輕鋼骨架樓板
    BM-A4樓蓋梁C254 mm×40 mm×13 mm×1.5 mm,
    間距400 mm;梁端加勁件
    C100 mm×35 mm×12 mm×1.5 mm;
    邊梁U254 mm×40 mm×1.5 mm;
    扁鋼帶寬50 mm,厚1 mm
    0.75 mm厚壓型鋼板—
    40 mm厚C30石膏基自流平砂漿
    ST4.8ST5.5
    周邊間距
    125 mm;中間
    間距250 mm
    113.0625.941.33
    BM-B40.75 mm厚壓型鋼板—
    40 mm厚C30細石混凝土
    116.3217.981.38
    下載: 導出CSV

    表  2  荷載組合

    Table  2.   Load combination


    荷載準永久組合荷載頻遇組合 荷載標準組合
    組合值
    Sd/(kN·m?2)
    組合樓蓋跨中撓度 組合值
    Sd/(kN·m?2)
    組合樓蓋跨中撓度組合值
    Sd/(kN·m?2)
    組合樓蓋跨中撓度

    驗/mm

    論/mm
    試驗/
    理論

    驗/mm

    論/mm
    試驗/
    理論

    驗/mm

    論/mm
    試驗/
    理論
    BM-A41.7360.770.890.87 1.9360.890.990.90 2.9361.331.500.89
    BM-B41.8240.670.780.862.0240.750.860.873.0241.091.290.85
    下載: 導出CSV

    表  3  組合樓蓋試件構造參數及抗剪性能指標

    Table  3.   Structural parameters and shear performance indexes of composite floor specimens

    試件輕鋼骨架樓板自攻螺釘極限承載力/
    kN
    初始剛度/
    (kN·mm?1)
    延性
    輕鋼骨架樓板
    FL-1樓蓋梁C254 mm×40 mm×13 mm×1.5 mm,
    間距400 mm,梁端加勁件
    C100 mm×35 mm×12 mm×1.5 mm,
    邊梁U254 mm×40 mm×1.5 mm;
    剛性支撐件C200 mm×40 mm×14 mm×
    1.5 mm,扁鋼帶寬50 mm,厚1 mm
    0.75 mm厚壓型鋼板ST4.8ST5.5
    周邊間距
    125 mm;中間
    間距250 mm
    212.76295.33.49
    FL-20.75 mm厚壓型鋼板—40 mm
    厚C30石膏基自流平砂漿
    267.50670.114.01
    FL-30.75 mm厚壓型鋼板—帶鋼絲網
    (d=1.9 mm)40 mm
    厚C30石膏基自流平砂漿
    251.68732.59.98
    下載: 導出CSV

    表  4  組合樓蓋試件面內跨中位移計算結果與試驗對比

    Table  4.   Comparison between in-plane midspan displacement calculation results and test results of composite floor specimens

    試件組合樓蓋面內跨中撓度值
    彈性階段屈服階段 極限階段
    試驗/mm公式/mm公式/試驗試驗/mm公式/mm公式/試驗試驗/mm公式/mm公式/試驗
    FL-10.130.141.08 3.213.170.99 7.027.751.10
    FL-20.140.130.930.910.870.969.249.060.98
    FL-30.140.130.930.800.750.944.814.891.02
    注:彈性階段對應的彈性荷載取為0.4Pmax;屈服階段對應的屈服荷載按照通用屈服彎矩法進行確定;極限階段對應的極限荷載取為Pmax。
    下載: 導出CSV

    黑人大屌丝逼逼
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  • 收稿日期:  2022-01-17
  • 修回日期:  2022-06-29
  • 網絡出版日期:  2022-07-08
  • 刊出日期:  2023-10-10

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